NBC Chicago: Thousands of COVID Tests ‘Invalid’ as CPS Prepares to Return From Winter Break

NBC Chicago: Thousands of COVID Tests ‘Invalid’ as CPS Prepares to Return From Winter Break. “Thousands of COVID tests for Chicago Public Schools students and staff members have been deemed ‘invalid’ as the district prepares for a return to classrooms following the winter break. With cases across the state and within the district surging, CPS reported 35,590 tests were completed between Dec. 26 and Jan. 1, but 24,843 were ruled ‘invalid,’ according to data posted on the district’s website.”

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